Tarawa-C (Gilbert Islands) Site History
Site
| Station | Tarawa-C, Betio |
|---|---|
| Country | Republic of Kiribati |
| Latitude | 01° 21.7' N |
| Longitude | 172° 55.8' E |
| GLOSS No | 113 |
| Time Reference | GMT (hours 00-23) |
| Contributor (1988-1991) | UH Sea Level Center 1000 Pope Road. MSB 317, Honolulu, Hawaii 96822 |
| Contributor (1992-present) | The National Tidal Facility (NTF), Flinders University of South Australia, GPO Box 2100, Adelaide, 5001, South Australia. |
| Instrument Type | Leupold & Stevens Analog-to-Digital Recorder (ADR) and Handar Encoder 436 (ENC) float/well gauges NTF: Aquatrak acoustic gauge (SEAFRAME) |
| Primary Gauge | ADR: 1988-90 ENC: 1991-97 SEAFRAME: 1998- |
| Site of Gauge | The gauge is situated at the end of the harbour wall. |
| Observational periods | 1988 - 2001 |
Reference Level
All heights have been referred to the station tide staff zero which is linked to fixed bench marks.
Tide gauge benchmark (TGBM) description
| Benchmark | Description |
|---|---|
| BM1 | The SS bolt has no stamp and is embedded into the concrete curb of the bulkhead directly above the tide staff (about six feet west of the jetty), (established December 1987). |
| BM2 | The SS bolt has no stamp and is embedded into the concrete foundation of the memorial on the corner facing the jetty (established December 1987). |
| BM3 | The SS bolt has no stamp and is embedded in the centre (4th) concrete buttress of the freezer plant wall, which faces towards the lagoon. |
| BM4 | The SS bolt has no stamp and is embedded in the concrete foundation of the ice plant in the south west corner, facing the channel into the boat harbour. |
| BM5 | SS The bolt is embedded into the concrete porch in the south west corner of the National Fishing Company building (established December 1990). |
Quality Assessment by the UH Sea Level Centre
Comment
The daily and monthly means reveal no apparent changes in the reference level and agree well with Nauru and Kanton.
The years 1999 to 2001 show questionable fluctuations on many neap tides.
| Year | CI(%) | Missing Data | Replaced Gaps or Bad Data | Questionable Fluctuations |
|---|---|---|---|---|
| 1988 | 95 | none | none | 212-214,238-242,269-271 |
| 1989 | 100 | none | none | none |
| 1990 | 100 | none | none | none |
| 1991 | 100 | none | none | none |
| 1992 | 4 | 001(00)-338(00)355(00)-365(23) | none | none |
| 1993 | 62 | 001(00)-086(00),090(00)-091(00),132(00)-183(00) | none | none |
| 1994 | 72 | 019(00)-117(13,160)(03)-161(05),364(00)-365(23) | none | none |
| 1995 | 98 | 001(00),075(23)-078(23),355(00)-356(00) | none | none |
| 1996 | 99 | 344(21)-346(06) | 033(10,13,14),340(18-21) | none |
| 1997 | 100 | none | none | none |
| 1998 | 100 | none | none | none |
| 1999 | 99 | 170(18)-173(21),331(21)-333(02) | none | see comment above |
| 2000 | 100 | none | none | see comment above |
| 2001 | 100 | none | none | see comment above |
